Needle-nose pliers are used for gripping thin objects, such as a cotter pins. They do not offer the same gripping options as other types of pliers, but are still an important basic tool. Some needle-nose pliers have a built-in wire cutters.
Gearwrench PivotForce Needle Nose Pliers
These particular needle nose pliers have a compound action for more leverage on the squeeze. Get these Gearwrench 82121 PivotForce needle nose pliers here.
Bent Needle-Nose Pliers
Some tool companies offer a pre-bent needle nose plier set or individual tools, typically bent at 45° and 90°.